Knife-polishing machine.



G. S. BLAKESLEE.

KNIFE POLISHING MACHINE.

APPLICATIONFILED SEPT. 22.1913.

1,177,679. Patented Apr. 4,1916.

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1 UNITED STATES ra'rnwr amen GEORGE S. BLAKESLEE, OF CHICAGG, ILLINOIS.

KNIFE-POLISHING MACHINE.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed September 22, 1913. Serial No. 791,124.

machines, and has for its object the provision of a new and improved form or arrangement of parts by which a knife may be polished quickly and thoroughly.

Itis another object of my invention to provide improved means for feeding a polishing powder to the polishing faces.

It is another object of my invention to improve machines of this type in sundry details hereinafter pointed out.

The means by which I have accomplished these objects are illustrated in. the accompanying drawings and are hereinafter specifically described.

That which I believe to be new is set forth in the claims.

In the drawings, Figure 1 is a front view of my improved machine; Fig. 2 is a side view of such machine as seen from the right in Fig. 1; Fig. 3 is an enlarged detail, be-.

ing substantially a section on line 33 of Fig. 1, with the main portion of the frame and operating parts omitted; and Fig. 4 is an enlarged detail, being a cross-section on line 44 of Fig. 2, with a portion of the frame omitted. 3 Referring to the several figures of the drawings, 11 indicates a frame comprising legs 12 and a journal box 13 for the shaft hereinafter described. 7

' 14 indicates a shaft rotatably mounted in the journal box 13, with antifriction bearings 15 of any suitable type interposed between the shaft and the journal box.

16 indicates a pinion mounted upon said shaft 14 and held against rotation relative thereto by means of a set screw 17.

18 indicates an internal gear meshingwith the pinion 16 and rotatably mounted upon a stud 19 projecting from the frame 11.

20 indicates a crank arm secured to the gear 18 and hearing at its outer end a handle 21. V

Referring now particularly to Fig. 4, 22

indicates a sleeve 'mounted upon the shaft 14. 23 indicates a. circular plate mounted upon the shaft 14and held against rotationthereon by means of a lug 24 engaging a notch 25 in a flange 26 formed upon one end of the sleeve 22. '27 indicates an'annular strip of felt or other yielding material.

secured in any suitable manner upon. one face of the plate 23. 28.1nd1cates a circular piece of buckskin or other suitable polish V ing material secured in any suitable manner upon the outer face of the felt 27. 29 indicates av circular plate similar to the plate 23 loosely mounted upon the shaft 14, the;

plate 29 being likewise provided with a circular ring of felt 3.0 and a circular ring of buckskm 31. '32 indicates a sprmg mounted upon theend of the shaft 14 bear ing at its inner'end against the outer face of the plate 29 and bearing at its outer end against a thumb nut 33 'secured'by. means of screw threads upon the shaft 14. As shown in Fig. 4, the nut 33 is provided with a transverse slot whereby'itrmay be drawn together at one side by means of a screw 34 for locking the nut against rotation upon the shaft 14. V V

35 indicates a hole through the plate 29 opening into an annular chamber 36' between the plates 29 and 23 for the insertion of a polishing powder of any suitable type into said chamber. 37 indicates a closure plate pivotally mounted adjacent to the hole 35 for closing the same.

38 indicates an arm secured to the frame 11 at the forward portion thereof and 'extending forward therefrom. v 39 indicates a guard rising from the forward end of the arm 38, said guard being provided with a suitable opening 40 for the purpose hereinafter disclosed. 41 indicates a shield secured to the upper end of the guard 39-and extending around the edges of the plates 2329, being held at its lower end by means of a bracket 42 suitably mounted upon the frame 11. 44 indicates a bearing block supported in a suitable socket in the upper end of the arm 38.

In operation the shaft 14 is rotated by means of the crank handle 21 through the medium of the gear 18 and pinion 16. as will be readily understood, rotating the plate 23. The nut 33 having been suitably tightened upon the shaft 14, the spring 32 serves to hold the polishing strip 31 of the plate 29 yieldingly in contact with the polishing strip 28 of the plate 23, causing the plate 29 to rotate with the plate 23. With the plates 23-29 rotating in this manner, after a supplyof polishing powder has been inserted through the opening 35, the knife which it is desired to have polished is inserted through the opening 40 in the guide 39 between the polishing faces 2831 in the position illustrated in Fig. 3. As the polish ing powder is brought in contact with the knife as it is pulled back and forth, a limited amount of the polishing powder is worked in between the polishing faces 28-31, rendering such buckskin parts righly eflicient for polishing purposes. By reason of the felt backing of the polishing parts 2831, the polishing faces are adapted to give more or less to compensate for any irregularities in the shape of the knife being polished.

Inasmuch as the bearing block i4: is square in cross section and is loosely supported in the upper end of the arm 38, it will be understood that such bearing block can be withdrawn whenit becomes worn andcan be turned to bring one of the unworn faces of the block into operative position. Inasmuch Copies of this patent may be obtainedvfor five cents each, by addressing the as the opening 1-0 through which the knife is inserted does not come at the middle point of the block 4%, it will be understood that when such block becomes worn on all four faces at one end, the block can be turned to utilize its other end for bearing purposes.

While I have shown my plates 23-29 faced with buckskin, it will be understood that I do not restrict myself to that particular form of polishing facing, except as hereinafter specifically claimed.

tion of a shaft, two plates mounted thereon,

means for causing one of said plates to rotate with said shaft, a piece of yielding material mounted on the face of each plate ad- 7 acent to the other plate, polishing facings V mounted on said pieces of yielding material, a spring mounted on said shaft adapted to hold said plates yieldingly together with their polishing facings in contact, means 7 for ad ust1ng the tension of said spring, and r meansfor rotating said shaft. 7

2. In a polishing machine, the combinatlon of two oppositely-positionedplates,

each of which is provided with two annular V spaces on its inner face, a piece of yielding material mounted in the outer annular space of eachplate, polishing 'facings' mounted onsaid pieces of yielding material, means for holding said plates yiel'dingly together with their polishing facings in contact whereby the inner annular spaces form achamberfor holding a polishing powder, and means for rotating sald plate 3. In a polishing machine, the combination of two oppositely-positioned plates,"

polishing facings mounted on theadjacent faces of said plates, means forrctating said plates with their polishing facings in con-V" tact, and a guide at theedges of said plates providing a narrow opening through which a knife is adapted to be inserted between said polishing facings.

GEORGE S. BLAKESLEE. Witnesses JoHN L. JACKSON, WILLIAM A. FURNNER.

Washington, 1L0.

Commissioner of Patents, 

